Lubricant



Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE FREDERICK W.SULLIVAN, 33., 01' WRITING, INDIANA, ASSIGNOB) TO STANDARD OIL COMPANY,OF WRITING, INDIANA, A CORPORATION OF INDIANA- LUBBICAN '1.

No Drawing.

be fully understood from the following de-' scri tion thereof.

I ave found that the lubricating properties and metal wetting propertiesof mineral lubricant oils may be substantially increased by the additionthereto of soaps of fatty acids with strongorganic nitrogenous bases,particularly those ca able of forming carbonates stable at the oilingpoint of water, such soaps being further characterized in that they formsubstantially no ash o? ignition, and are stable under conditions 0 use.

A material of the nature of a soap which may be incorporated into amineral lubricant oil in accordance with the present invention may beproduced by heating together, suitably at steam bath temperatures,dicyandiamid with slightly more than a monomolecu lar equivalent of asuitable fatt acid, such as oleic acid. Other fatty aci s may also beemployed, as stearic acid, the acid of tallow, cottonseed oil, palm oiland the like. The resulting material, which may be designatedas a soap(although its precise composition has not yet been determined), may beincorporated in a mineral lubricant oil, for example, a. viscouspetroleum distillate having a viscosity of 200 sec. Saybolt at 100 F.

or higher in proportions of 0.2% upwardl and preferably about 0.5%, tosubstantial y increase the lubricating properties of the oi In a similarmanner I ma employ the higher.

fatty acid soaps of guamdine and of guanyl derivatives such asdicyandiamidine prepared by heating these compounds or their carbonateswith a suitable fatty acid. In general, organic bases containing theguanyl radical are highly suitable for use in preparing soaps to beincorporated into mineral ubricating oils in accordance with the presentinvention. I

The lubricating oils produced in accordance with the present inventionare particularly suited for lubricating automotive engines. In types ofautomobiles such as those having planetary transmissions in a casingopen to the crank casing of theautomobile Application filed November 1,1926. Serial No. 145,700.

engine, lubricant. oils prepared in accordance with the presentinvention provide not only a highly effective lubrication for theautomotive engines, but also prevent glazing and consequent chatter ofthat-ransmlssion bands of the planetary transmission.

Iclaim: 4 a

1. A lubricating compound comprising a lubricant mineral oil and a fattyacid soap of a. non cyclic organic base havin at least two aminonitrogens bonded to a car on atom and capable of formin carbonatesstable at the temperature of boifi substantially ashless upon ignition.

2. A lubricating compound comprising a lubricant hydrocarbon oil and afatty acid compound of 'an organic base containing a guanyl radical.

3. A lubricating compound comprising a viscous hydrocarbon oil and afatty acid soap of guanidine.

ngwater, said soap being 4. The method of treating brake andtransmission bands used in connection with a planeta transmission tokeep the bands soft and pliiizle which consists in maintaining in thetransmission casing a bath. consisting of a viscous hydrocarbon oil,combined with a fatty acid soap of a non-cyclic organic base havmg atleast two amino nitrogens bonded to a carbon atom capable of-formingcarbonates stableat the temperature of boiling water;

5. The method of treating brake and transmission bands used inconnection with a planetary transmission to keep the bands soft andpliable whic'h'consists in maintaining in the transmission casing a bathconsisting of a viscous hydrocarbon oil, combined with a fatty acid soapof an organic nitrogenous base containing aguanyl radical.

6. The method of improving the lubricant qualities of a viscoushydrocarbon oil vehicle consists in adding thereto a fatty acid soap ofa non-cyclic organic base having at least two amino nitrogens bonded toa carbon atom and capable of forming carbonates stable at thetemperature of boiling Water, said soap being substantially ashless uponignition.

7. The method of improving the lubricant qualities of a viscoushydrocarbon oil which consists in adding thereto a fatty acid soap of anorganic nitrogenous base containing a guanyl radical.

8. A lubricating compound comprising a viscous hydrocarbon oil and afatty acid soap of a compound of the type formula NH: NH=C NHR in whichR is hydrogen or a substituting group.

9. A lubricating compound comprising a lubricant mineral oil and 0.2 toabout 0.5% of a fatty acid soap of a non-cyclic organic base having atleast two amino nitrogens bonded to a carbon atom and capable of formingcarbonates stable at the temperature of boiling water, said soap beingsubstantially ashless upon ignition.

10. A lubricating compound comprising a lubricant hydrocarbon oil and0.2 to 0.5% of a fatty acid compound of an organic base containing aguanyl radical.

11. A lubricating compound comprising a viscous hydrocarbon oil and 0.2to 0.5% of a fatty acid soap of guanidine.

12. A lubricating compound comprising a lubricant hydrocarbon oil and afatty acid soap of dicyandiamid.

13. A lubricant compound comprising a viscous hydrocarbon oil and afatty acid soap of dicyandiamidine.

FREDERICK W. SULLIVAN, JR.

